Perth Monthly Water Update - October 2022
| Target | Actual | |
|---|---|---|
| October water use to date |
24.1 billion litres |
23.6 billion litres |
| Dam storage levels | N/A | 62.9% |
| October streamflow into dams | N/A | 5.08 billion litres |
| October rainfall to date | 51.5mm (October average rainfall 1876-2016) | 25.4mm |
| Note: 1 billion litres = approximately 400 Olympic swimming pools. | ||
Water use
| Week ending | Daily average use (million litres per day) |
Daily average forecast (million litres per day) |
|---|---|---|
| 28/10/2022 | 783 | 866 |
| 21/10/2022 | 831 | 832 |
| 14/10/2022 | 793 | 799 |
| 07/10/2022 | 746 | 767 |
| Note: Average water use is calculated based on 7 days of data, from Saturday 1 October through to Friday 28 October, 2022. | ||
Since 1 July 2022 to date, the Integrated Water Supply Scheme (IWSS)* has supplied 81.7 billion litres of water - which is 1.4 billion litres below the forecast target for this period.
*The IWSS supplies Perth, the Goldfield and Agricultural Region and some parts of the South West.
Dam levels (total for 15 dams)
October's metro dam storage levels are slightly down from September and are sitting at a combined average of 62.9 per cent* of full capacity (or 396 billion litres). This time last year our metro dam storage levels were at 63.7 per cent* of full capacity (or 402 billion litres).
*Please note some dams are filled from different sources - dam levels include the transfer of groundwater and desalinated seawater from treatment plants as well as streamflow (that comes from rainfall). As we use many different sources of water, dams are no longer an accurate indicator of the health of Perth's overall water supply situation.
Streamflow (total for 15 dams)
From 1 May 2022, the dams have received 85.1 billion litres of streamflow. The post-1975 average for the May to April period (called the streamflow year) is 177.1 billion litres.
Sprinkler roster compliance
Since 1 January 2022, we have taken a total of 4,301 actions (warnings + fines) compared with 4,714 actions for the same period in 2021.
Annual rainfall
Perth has received 664.8mm of rainfall since 1 January 2022. The average (1876-2016) rainfall for the same period to the end of October is 809mm. The wettest day this month was 24 October, with 9.4mm of rainfall received in Perth.
Temperature
The maximum temperature this month was recorded on 19 October at 32°C. The coolest day was recorded on 29 October at a maximum of just 17.9°C.
General water news
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